1.创建

 1.创建一个xml文件
      XDocument xDoc = new XDocument(new XDeclaration("1.0","utf-8","yes"));
      2.创建子节点
      XElement xele = new XElement(new XElement("students",//最外层父节点


                      new XElement("student",//父节点，节点student
                        new XElement("姓名","张三"),//student节点下，创建姓名节点
                        new XElement("年龄","18"),//依次...都是student的子节点
                        new XElement("班级","土匪班")
                            ),new XElement("student",new XElement("姓名","李四"),new XElement("年龄",19),new XElement("班级","悍匪班")
                             )
                    ));
      3.将子节点添加到文档，保存文件。
      xDoc.Add(xele);
      xDoc.Save("Student-1.xml");

 //加载xml文件 XDocument xDoc = XDocument.Load("Student-1.xml"); var temp = from doc in xDoc.Descendants("student") //where doc.Name == "姓名" select doc; foreach (var item in temp) { Console.WriteLine(item); } 

            XDocument xDoc = XDocument.Load("Student-1.xml");
            xDoc.Root.Add(new XElement("student","王五"),"22"),"共产党")
                                      )
                          );
            xDoc.Save("Student-1.xml");
            foreach (var item in xDoc.Descendants("student"))
            {
                Console.WriteLine(item);
            } 

            XDocument xDoc = XDocument.Load("Student-1.xml");
            var temp = from u in xDoc.Descendants("姓名")
                       where u.Value == "王五"
                       select u.Parent;
            temp.ToList().Remove();
            xDoc.Save("Student-1.xml");
            foreach (var item in xDoc.Descendants("student"))
            {
                Console.WriteLine(item);
            }